Practicality of Rhenium 188
At the moment a price cannot be placed on Rhenium 188 because it is still in clinical trials. Testing facilities are needed to help with this process. Places like Columbia University and Cedar Sinai Medical Center are testing rhenium 188 now. Rhenium 188 is under Good Manufacturing Processes, which means everything is being handled and done safely. The beta particles of Rhenium 188 come from the Rhenium 188/Tungsten 188 generators. Rhenium 188 only has a half life of about 16.9 hours, so there is not much of a worry that there will be nuclear energy just sitting around.